How DataReader works?

Question

I was thinking that the SQLDataReader should not work if there is no connection to the SQLServer.

I experimented this scenario. I execute the ExecuteReader then stop

Answer 1

The underlying connection type may well impact how much data is supplied at a time. For a small amount of data using the shared memory connector it is quite possible that all the data is sent together.

Shared memory is the default protocol when client and server are on the same machine.